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Author Spotlight: Quantifying Siderophores and Pyochelin for Infection Control
Published on: March 15, 2024
Targeting human pathogenic bacteria by siderophores: A proteomics review
Daniela Ferreira1, Ana M L Seca2, Diana C G A1
1Department of Chemistry & Organic Chemistry, Natural Products and Food Stuffs (QOPNA), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
Unlabelled:
Human bacterial infections are still a major public health problem throughout the world. Therefore it is fundamental to understand how pathogenic bacteria interact with their human host and to develop more advanced drugs or vaccines in response to the increasing bacterial resistance. Since iron is essential to bacterial survival and growth inside the host tissues, these microorganisms have developed highly efficient iron-acquisition systems; the most common one involves the secretion of iron chelators into the extracellular environment, known as siderophores, and the corresponding siderophore-membrane receptors or transporters responsible for the iron uptake. In the past few decades, several biochemical methods and genetic screens have been employed to track down and identify these iron-scavenging molecules. However, compared with the previous "static" approaches, proteomic identification is revealing far more molecules through full protein mapping and becoming more rapid and selective, leading the scientific and medical community to consider standardizing proteomic tools for clinical biomarker detection of bacterial infectious diseases. In this review, we focus on human pathogenic Gram-negative bacteria and discuss the importance of siderophores in their virulence and the available proteomic strategies to identify siderophore-related proteins and their expression level under different growth conditions. The promising use of siderophore antibiotics to overcome bacterial resistance and the future of proteomics in the routine clinical care are also mentioned.
Significance:
Proteomic strategies to identify siderophore-related proteins and their expression level can be helpful to control and/or find a cure of infectious deseases especially if related with multidrug resistance. Siderophores are low-molecular-weight compounds produced by bacteria which can become clinical biomarkers and/or antibiotics used mainly in "Trojan horse" type strategies. Due to the above mention we think that the promising use of siderophore to overcome bacterial resistance and the future of proteomics in the routine clinical care is a hot topic that should be discussed.
Insights
Human pathogenic bacteria use siderophores for iron acquisition. Proteomics offers advanced methods to identify these molecules, aiding in developing new antibiotics and clinical biomarkers for infectious diseases, especially those with multidrug resistance.
Area of Science:
- Microbiology and Infectious Diseases
- Proteomics and Biochemistry
Background:
- Bacterial infections pose a significant global health challenge, exacerbated by increasing antibiotic resistance.
- Pathogenic bacteria, particularly Gram-negative bacteria, rely on efficient iron acquisition systems, involving siderophores and their transporters, for survival and virulence within the human host.
- Traditional methods for identifying iron-scavenging molecules are being surpassed by more rapid and selective proteomic approaches.
Purpose of the Study:
- To review the critical role of siderophores in the virulence of human pathogenic Gram-negative bacteria.
- To discuss current and emerging proteomic strategies for identifying siderophore-related proteins and their expression levels.
- To highlight the potential of siderophores as antibiotics to combat drug resistance and the future integration of proteomics in clinical diagnostics.
Main Methods:
- Review of existing literature on bacterial iron acquisition, siderophore biology, and proteomic techniques.
- Analysis of proteomic strategies for identifying siderophore-related proteins and quantifying their expression under various growth conditions.
- Discussion of the application of siderophores in antibiotic development and the role of proteomics in clinical biomarker detection.
Main Results:
- Proteomic identification is a powerful, selective, and rapid method for discovering siderophore-related molecules compared to traditional biochemical and genetic screens.
- Siderophores are crucial for bacterial virulence and represent potential targets for therapeutic intervention.
- Proteomic tools are increasingly considered for standardization in the clinical detection of bacterial infectious disease biomarkers.
Conclusions:
- Understanding bacterial siderophore systems through advanced proteomic strategies is vital for combating infectious diseases and multidrug resistance.
- Siderophores hold promise as a new class of antibiotics, potentially utilizing a 'Trojan horse' mechanism to deliver antimicrobial agents.
- The integration of proteomics into routine clinical care is anticipated to significantly advance the diagnosis and management of bacterial infections.
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